Part Number 10-6101 is the standard K&B .61 muffler. Very early Veco and K&B .61's used a HB muffler. These will fit perfectly however the screw on the HB has an odd 5-44 thread. Click here for HB .61 muffler information.

Old part number 30-6101 includes:
Muffler, pressure nipple , and mounting screws 5-40 thread

Part Number 30-6102 is the Twister K&B .61 muffler used on the Twister and the very last Standard version made in Lake Havasu in the late 1990's. The exhaust flange was shorter on these two versions and the used 6-32 size screws.

Part number 30-6102 includes:
Muffler, pressure nipple , and mounting screws 6-32 thread

Discontinued

First style VECO .61

Used 2 rings

Part number 30-6104 for Standard K&B .61 5x40 thread
Part number 30-6105 for K&B Twister .61 6x32 thread

Part number 30-4811 for K&B .48 and Twister 6x32 thread
This has elongated holes to accept both hole patterns.

Part number 30-0902 for HB .40 & .61 5x44 thread
Same as 30-6104 except with HB screws and thread.

Set includes: 1 muffler extension - 2 socket head screws

In the late 1990's with the standard engine and the Twister, the exhaust flange was shortened like the example on the left. The also used a 6-32 screw to attach the muffler.

The case on the tight was the normal lenght of the exhaust flange used from the begining. We have returned to this length on the latest production with the 3 webs on the front of the case. For more information click here.

Items usually purchased with this

29-0931 Muffler Gaskets